Denarius, type 1 (CARLVS REX R . monogram Carolus)

Obverse

Obverse legend

Reverse legend

Reverse

CARLVS REX R (circular legend around a cross surrounded by a circle made up of dots, a cross between R and CARLVS).

BITVRICAS (circular legend with the letter S tilted, around the Carolus monogram (1) surrounded by a circle made up of dots, a cross between the letters S and B).

Photo of a coin sold by cgb.fr, link to the sale and their website: https://www.cgb.fr/charles-ier-dit-charlemagne-denier-ttb,bca_321965,a.html.

Monograms Carolus:

(1) Without letter A in the diamond on the middle.

(2) With the letter A inscribed at the top in the diamond on the middle.

Regarding the monogram "Carolus", see my comment on the coins of the Agen mint: https://www.all-your-coins.com/fr/modern-coins/monnaies-carolingiennes/charlemagne-en-cours-de-travail/deuxieme-periode-781-800/denier/agen/denier-type-1-carlvs-rx-fr-monogramme-carolus.

Quote: ''The monogram shows a letter K in the shape of a letter C. It can also be a poorly executed letter K, but it is disturbing to find it only with the legend RX. In my opinion, there is a probability that the monogram shows a letter C. A coin from the Bourges mint (this coin), showing this same form of letter, is the only one to have a shorter obverse legend with REX R. If the we add RX FR instead of REX FR on the other coins of Agen, we can start to think that this is the first issue of this mint. I chose to note the monogram as "Carolus". Without certainty that it is a letter C, but this allows to differentiate these coins from the others which display a letter K well executed.​''.